When did the earth come into existence?

When did the earth come into existence?

Ans: –4 to 5 million years age earth come into existence.

 

Why did life not exist on primitive earth?

Ans: – Because of the harsh climatic condition.

 

What are fossils?

Ans: – Remaining of the body parts of the animal and plant dumping under earth through million of years.

 

What is meant by Cambrain explosion?

Ans: –   600 million years ago sudden formation of different groups of invertebrates on the earth took place is known as Cambrain explosion.

 

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